Hey folks, I noticed my 2008 Prius making a gurgling sound today, just barely audible over the ICE. Trying to track down the issue, I noticed that it was only there when the ICE was starting after being stopped; i.e. if I was stopped at a traffic light and restarting. The noise did not start as soon as I started moving, but rather as soon as the ICE kicked in the gurgling started. It only lasted for a few seconds each time, and seemed like it may have been worse if I was on an uphill slope. I recently had the oil changed at the dealer (<2 weeks ago), and they put in the 0w-20 Toyota synthetic for the first time (third synthetic change though, I'm not sure why they changed it up this time). I'm wondering if maybe they overfilled it... waiting for the car to cool down a bit before I go pull the dipstick and check. Coolant level looks fine in the reservoir. Today was the first time I've noticed the noise, but I usually have the radio on and that easily could have masked it. Does this raise red flags for anybody else? I'm about to have it taken in anyway to have the 12v battery replaced and I'll probably have them look at it too; just trying to get a grasp on what this might be before I take it in. Thanks!